Which of the following is not a major functional class of proteins?
A) hereditary proteins
B) enzymes
C) motility proteins
D) regulatory proteins
E) structural proteins
Answer: A
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The area of Earth that supports life is known as the ____
a. atmosphere b. biosphere c. hydrosphere d. lithosphere e. stratosphere
All of the following are sources of environmental damage in desert biomes except:a
people driving across the desert in four-wheel drive vehicles b. poaching c. irrigation of desert soils d. increased groundwater consumption by desert cities e. aquifer buildup
A solution that has a higher concentration of dissolved materials than the solution it is compared to is
A. hypertonic. B. hypotonic. C. hydrophobic. D. hydrophilic.
Different types of living matter often have different forms of the same elements in their bodies. For example, the nitrogen in an animal often has a slightly different atomic structure than the nitrogen in a plant
Recently, nutritionists have discovered how to deduce the diets of various animal species by examining the type of nitrogen (and other elements) inside their bodies. What is the chemical basis behind this scenario? A) Radioactive elements can be used to trace the paths of molecules through the body. B) Antioxidants buffer the potential damage that free radicals do to cells. C) Covalent bonds result when two atoms share electrons. D) Hydrophobic interactions keep water molecules from forming bonds with fats and oils. E) Isotopes of the same element have the same atomic number but different atomic masses.